Quote:
Originally Posted by Jared341
I have often heard that cascaded elevators require a return drum of a different diameter than the feed. But wouldn't the following work?
Each segment of the elevator can have a closed loop of belt/chain attaching it to the prior stage. It should be anchored at the top of the previous stage (or motor for the first stage), and the bottom of the next stage. It's important that the total length of the loop doesn't change as it travels up and down.
You still have the speed and force multiplier effect with each stage, but you won't have to worry different feed and return speeds.
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Yes this will and does work. I just finished designing an elevator that uses this principle with a rack and pinion style. I will soon be finishing a fee things and create a thread or something. As I put it on my facebook I found out from Adam that 973 did this exact style for their 2011 offseason robot. If you havent seen it you can look it up here on Chief Delphi, or also go to FRC -Designs.com and the CAD is there fr download, really nice looking if tou haven't downloaded already.
Jared you can go on my facebook an look at it there in my Robotics Album. I uploaded it last night, but you can't reallysee the design very well of what you are describing. Thats why I will upload it in a thread soon and will likely add my design to FRC designs.